![]() ![]() (For a list of all about: pages, enter about:about in the address bar. Check your Firefox version (in the About Firefox window) and look for (32-bit) or (64-bit) after the version number: If you see (32-bit) and you are running Firefox 56.0 or older, updating to the latest Firefox version. The Troubleshooting Information page ( about:support page) includes other about: page links and troubleshooting resources. If you’re running 64-bit Windows ( here’s how to check ), your Firefox may already be 64-bit. Telemetry Data shared with Mozilla ( about:telemetry page) contains detailed data about performance, hardware, usage and customization. The Firefox Task Manager ( about:performance page) lets you see what tabs or extensions are slowing down Firefox. If you've tried all of these troubleshooting methods, and you're still having problems, here are some other solutions you can try: See the Profile Manager - Create, remove or switch Firefox profiles article for instructions. You can create a new, additional profile which will not contain any of your old Firefox data. Sometimes files in your Firefox profile folder that correspond to the essential information that a Firefox Refresh doesn't remove (such as bookmarks and browsing history) may be causing the issue. You can also do a manual refresh by creating a new profile and transferring your important data to the new profile. Note: There's a Refresh Firefox button in the Firefox Troubleshoot Mode Safe Mode window, if you can't start Firefox normally. ![]() Make sure other items you want to keep are not selected.
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